/*
 Queue Plug-in

 Features:
   *Adds a cancelQueue() method for cancelling the entire queue.
   *All queued files are uploaded when startUpload() is called.
   *If false is returned from uploadComplete then the queue upload is stopped.
    If false is not returned (strict comparison) then the queue upload is continued.
   *Adds a QueueComplete event that is fired when all the queued files have finished uploading.
    Set the event handler with the queue_complete_handler setting.

 */

var SWFUpload;
if (typeof(SWFUpload) === "function") {
  SWFUpload.queue = {};
  
  SWFUpload.prototype.initSettings = (function (oldInitSettings) {
    return function () {
      if (typeof(oldInitSettings) === "function") {
        oldInitSettings.call(this);
      }
      
      this.customSettings.queue_cancelled_flag = false;
      this.customSettings.queue_upload_count = 0;
      
      this.settings.user_upload_complete_handler = this.settings.upload_complete_handler;
      this.settings.upload_complete_handler = SWFUpload.queue.uploadCompleteHandler;
      
      this.settings.queue_complete_handler = this.settings.queue_complete_handler || null;
    };
  })(SWFUpload.prototype.initSettings);

  SWFUpload.prototype.startUpload = function (fileID) {
    this.customSettings.queue_cancelled_flag = false;
    this.callFlash("StartUpload", false, [fileID]);
  };

  SWFUpload.prototype.cancelQueue = function () {
    this.customSettings.queue_cancelled_flag = true;
    this.stopUpload();
    
    var stats = this.getStats();
    while (stats.files_queued > 0) {
      this.cancelUpload();
      stats = this.getStats();
    }
  };
  
  SWFUpload.queue.uploadCompleteHandler = function (file) {
    var user_upload_complete_handler = this.settings.user_upload_complete_handler;
    var continueUpload;
    
    if (file.filestatus === SWFUpload.FILE_STATUS.COMPLETE) {
      this.customSettings.queue_upload_count++;
    }

    if (typeof(user_upload_complete_handler) === "function") {
      continueUpload = (user_upload_complete_handler.call(this, file) === false) ? false : true;
    } else {
      continueUpload = true;
    }
    
    if (continueUpload) {
      var stats = this.getStats();
      if (stats.files_queued > 0 && this.customSettings.queue_cancelled_flag === false) {
        this.startUpload();
      } else if (this.customSettings.queue_cancelled_flag === false) {
        this.queueEvent("queue_complete_handler", [this.customSettings.queue_upload_count]);
        this.customSettings.queue_upload_count = 0;
      } else {
        this.customSettings.queue_cancelled_flag = false;
        this.customSettings.queue_upload_count = 0;
      }
    }
  };
}
